Carbureter.



. I TEE c CARBURETER.

Application filed July 9,

To all whom it may concern:

Be it known that I, ASHLEY C. BENNETT, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

My invention relates to carbureters and.

has for its object to provide means for puri-.

fying air going to carbureters used under conditions in which there is much dirt, sand and mineral matter in the air, such as is true with carburetersused 0n traction. engines. Traction engines are oordinarily employed for agricultural purposes where plows, cultivators, harrows, etc., are drawn over fields. In dry weather, and in fact at practically all times, the air going to the carbureter will under such conditions be charged with particles of dirt and sand, which, if the same pass to the engine cylinder,'may rapidly cut out the cylinders and pistons, greatly decreasing the life of the engine and also interfering with the carbureting process.

Means have heretofore been employed to remove such impurities from the air by a straining process; that is, bafiies of perforated material have been provided in connection with the air intake through which the air would have to pass, the interstices through said battles being too small to permit the passage of the particles of dirt and sand. The objection to this form of device has been that while they have worked well at the start they rapidly become clogged with impurities and correspondingly diminish the actual opening for the passage of air, which has the effect of varying the action of the carbureter and seriously diminishing its effectiveness.

It is the primary object .of my invention to provide means for taking solid matter from the air which will operate to that end without in any manner restricting the normal passageway provided for the free ad mittance of air to theointake of the carbureter. I accomplish this by providing a casing forming a chamber and intake passageways entering and leaving said chamber in such manner that a dead air space};

is formed in one part of the chamber, and

the air currents directed through the pas.-

sageways will make a sharp turn away from said dead air space in passing to the carbureter. The particles of mineral matter,

Specification of Letters Patent.

Patented Apr. 24, 1917.

1915. Serial No. 38,892.

grit, etc., are thus projected out of the air I current and into the dead air space-where they come to rest and accumulate and from which such accumulation may from time to time be discharged. This arrangement is such that no matter what the accumulation of dirt may be within the chamber it can never have the effect of restricting the air admission passageways. The dirt removing mechanism will therefore never interfere with the normal operation of the carbureter.

The full objects and advantages of my invention will appear in connection with the detailed description thereof and are particularly pointed out'in the claims.

In the drawings, illustrating the application of my invention in one form,

Figure 1 is a. part'sectional side elevation of a carbureter including my dirt remov device. Fig. 2 is a side elevation of a part of the apparatus shown in Fig. 1. Fig. 3 is a sectional elevation of a modified form of my invention taken on line 33 of Fig. 4. Fig.4 is a sectional view taken on line 44 of Fig. 3.

As illustrated, a portion of the intake pipe 10 of the carbureter 11 may be extended, as indicated at 12, into an expanded funnelshaped chamber 13, from which depends a cylindrical portion 14. In the form of the device shown in Figs. 1 and 2, the portion 14 has secured thereto a cylindrical casing '15 of such size that a passageway 16 is left between the inner wall of said casing 15 and the outer wall of the cylindrical portion 14. The casing 15 is extended downwardly in a conical portion 17 which passes the lower edge 1.8'of the cylindrical portion 14 so as to leave a narrow annular passageway 19 entirely between said lower edge 18 and the inner wall of the conical portion lZ- i The portion 14 is open at the bottom but has mounted therein a disk 20 which is of asize smaller than the interior of cylindrical portion 14 so as to leave an annular passageway 21 between the edge of said disk and the inner walls of the portion 14. The conical portion 17 may be further extended, as indicated at 22, to form a pocket 23 closed by a cap 24 preferably held in position by -.means of a hasp25 which may enter a socket 26 on the cap 24. A disk 27 of waxed paper, rubber or other similar material may be employed inside of cap 24 to efl'e'ct perfect seal of the opening from pocket 23. The

, respectively, inside of chamber 33.

,casing 15 is attached to cylindrical portion 14 by an annular lip 28 which closes the top of the passageway 16. Air is admitted into passageway 16 through apertures 29' in the casing 15 just below the flange 28.

In operation, the air at maximum velocity will pass through the annular passageway 19, and in its further travel will be compelled to make a short turn about the lower edge 18 of the cylindrical portion 14 from which it will pass through the annular passageway 21 and on into the inlet pipe 10 and 12. The particles of dirt, grit etc., will travel with the air as far as the annular passageway 19, atthat point in a direction parallel to the conical wall 17 from which point said particles will continue under the momentum gained from their movement with the air, taking the direction of the dotted arrows in Fig. 1 and passing into the dead air space of pocket 23 where said particles will come to rest. These particles will thus be separated from the incoming current of air and the air promptly purified.

In the form of device shown in Figs. 3 and 4, the cylindrical portion 14 is directly continued into conical lower portion 30 and further depending portion 31 forming the dead air pocket 32 similar to the pocket 23 already described. The air is introduced into the. chamber 33 formed within the cylindrical portion 14 through a pair of identi'cal pipes 34 and 35, which pipes come from outside of the casing and pass through the wall thereof and are each formed with a depending cutaway portion 36 and 37, The pipes 34 and 35 extend obliquely within casing 33 and the cutaway portions in a substantially horizontal position, cutaway portion 36 extending partly under pipe 35 and cutaway portion 37 extending part y under pipe 34, as clearly shown in Figs. 3 and 4.

In the operation of this form of device, the particles of dirt and grit are thrown downwardly along the wall of easing 14, while the air turns upwardly from the cutaway portions and passes out through the lntake pipe 10, 12. The particles of dirt will thus pass through the momentum given by the air current and through the force of gravity into dead air space 32.

The many advantages of my device will be apparent. In either form, the dirt and grit is separated from the air without the necessity of passing the dirt through'the baffle or strainer. The velocity of the air currents is never-impeded by the separating having an inlet pipe adapted to be con- "nected to an internal combustion engine so that air will be caused to pulsate through said pipe in response to the suction of the engine, of means associated with said inlet pipe and operative upon the pulsating currents of air as it passes to the inlet pipe for causing continuous gravity separation of solid impurities from the air entering the carbureter while continuously permitting unrestricted maximum flow of air through the inlet pipe to the carbureter.

2. In combination with a carbureter having an inlet pipe adapted to be connected to an internal combustion engine so that air will be caused to pulsate through said pipe in response to the operations of the engine. an expandedcasing connected with said inlet pipe and embodying a depending closed chamber providing a dead-air space for the reception of solid impurities from the air and embodying means for directing the pulsating currents of air toward and then away from said dead-air chamber whereby said solid impurities are thrown into the dead-air space and will gravitate therein to the closed end of the chamber.

3. In combination with a carbureter having an inlet pipe adapted to be connected to an internal combustion engine so that air will be caused to pulsate through said pipe in response to the operations of the engine, a casing applied to the open end of said pipe and forming an expanded intake passageway, a casing extending below said intake passageway forming a normallyclosed chamber providing a dead-air space for the reception of solid impurities from the air passing into said first-named casing, and means for admitting air into said first-named casing and directing the same so that it will be caused by thepulsations of theengine to circulate above and about said dead-air space as it passes into said expanded intake passageway whereby said solid impurities are thrown into the dead- F. A. WfiITELEY,

H. A. BowMAN. 

